endian.h

它通过提供glibc兼容使得应用程序移植到较小的c 库时相当得容易. 它能够应用到带虚拟存储的Linux和uClinux上.在大多数带MMU部件的平台上为使它更加紧凑,它也能够编译成共享库.uClib

/* Sparc is big-endian, but v9 supports endian conversion on loads/stores
   and GCC supports such a mode.  Be prepared.  */

#ifndef _ENDIAN_H
# error "Never use <bits/endian.h> directly; include <endian.h> instead."
#endif

#ifdef __LITTLE_ENDIAN__
# define __BYTE_ORDER __LITTLE_ENDIAN
#else
# define __BYTE_ORDER __BIG_ENDIAN
#endif